VIDEO: Watch the First Footage from the Doctor Who 50th Anniversary

We suggest you sit down for this.That's how mind-blowing it is to seeMatt SmithandDavid Tennant share the screen in the latest trailer for theDoctor Who50thanniversary.TV characters who were supposed to dieIn addition to our first glimpse at seeing Ten and ...

In addition to our first glimpse at seeing Ten and Eleven working together - fez included - the trailer also features the first footage of the last great Time War, Gallifrey and the ominous return of Bad Wolf.

Watch the trailer below.

The Doctor Who anniversary special airs Saturday, Nov. 23 on BBC America.